Estimation_handout - PSYC 227 Estimation Illustration 1...

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Unformatted text preview: PSYC 227, 11/05/09 Estimation Illustration 1 What type of study design is this? State the null and alternative hypothesis Define the critical region Compute a test statistic sample means: estimated variance: estimated standard error for the mean difference: Make a decision (make sure to state it in words of the problem) df: PSYC 227, 11/05/09 sample means: mean difference: estimated standard error for the mean difference: t: What is the 95% confidence interval for the mean difference? sample means: mean difference: estimated standard error for the mean difference: t: What is the 99% confidence interval for the mean difference? Compare the two confidence intervals: What does the hypothesis test tell us? What does the confidence interval tell us? PSYC 227, 11/05/09 Illustration 2 What type of study design is this? State the null and alternative hypothesis Define the critical region Compute a test statistic sample means: estimated variance: estimated standard error for the mean difference: Make a decision (make sure to state it in words of the problem) df: PSYC 227, 11/05/09 sample means: mean difference: estimated standard error for the mean difference: t: What is the 95% confidence interval for the mean difference? Estimation Summary What is the goal of estimation? Write down a general form of a confidence interval. What does the width of a confidence interval depend on? 1. 2. How can estimation be used to get an indication of the “significance” of the effect? ...
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